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While British people with the same DNA twist drank more tea, which the researchers put down to cultural reasons.

Study author Professor Marcus Munafò said: 'People in Norway and Denmark don’t chain drink tea in the same way that people in the UK do.'

The researchers also noted that the genetic variant causes someone to smoke an extra cigarette each day.

'If you smoked 10 cigarettes per day more than the next person, you would be drinking the equivalent of about one and a half extra cups of coffee per day,' according to the study author, Professor Marcus Munafò from the University of Bristol

But someone could have more than just one twist, and could have multiple - upping their tobacco intake by one each time.

And this correlated to less than a fifth of a cup of coffee in those with the twist.

Professor Munafò added: 'If you smoked 10 cigarettes per day more than the next person, you would be drinking the equivalent of about one and a half extra cups of coffee per day.'

A TOBACCO-FREE NHS

Health chiefs are calling for smoking to be completely banned in all NHS buildings and grounds.

Public Health England (PHE) is campaigning for a 'tobacco-free NHS' with more support on quitting offered to patients, visitors and staff.

Duncan Selbie, chief executive of PHE, said he wants every hospital's buildings and grounds to be completely smoke free.

But he insists the aim is to give people support and not to 'force' them to quit.

He added that 25 per cent of patients in hospitals are smokers.

He said: 'I believe we can make the NHS a place that provides a supportive tobacco-free environment for patients, staff and visitors, where helping people quit is fully integrated into their treatment.'

However, the researchers pointed out that cigarettes could also influence the way someone ingests caffeine.

They break the drug down quicker, meaning they need to consume more coffee to get the same kick.

But researchers were quick to point out that smoking increases caffeine consumption and not the other way around.

This comes after scientists from New Zealand found James Bond could be responsible for people's smoking addictions.

Cigarettes feature in all but one of the 24 movies filmed to date, new research has discovered.

And despite kicking the habit in 2002 - before Daniel Craig took over - he continues to be exposed to second-hand smoke from his sexual partners, experts say.

While a study in January warned that treating smokers for their illnesses costs a staggering £1.1 trillion ($1.4tn) each year.

The research - the first of its kind - showed that tobacco users receiving healthcare accounts for almost 2 per cent of the world's spending.

Known to increase the risk of heart disease and 17 forms of cancer, the cost of smoking was greatest in low and middle-income countries.